(Cat? OR feline) AND NOT dog?
Cat? W/5 behavior
(Cat? OR feline) AND traits
Cat AND charact*

This guide provides a more detailed description of the syntax that is supported along with examples.

This search box also supports the look-up of an IP.com Digital Signature (also referred to as Fingerprint); enter the 72-, 48-, or 32-character code to retrieve details of the associated file or submission.

Concept Search - What can I type?

For a concept search, you can enter phrases, sentences, or full paragraphs in English. For example, copy and paste the abstract of a patent application or paragraphs from an article.

Concept search eliminates the need for complex Boolean syntax to inform retrieval. Our Semantic Gist engine uses advanced cognitive semantic analysis to extract the meaning of data. This reduces the chances of missing valuable information, that may result from traditional keyword searching.

Publishing Venue

Related People

Abstract

In a pager with a microcomputer based decoder, this invention will allow a microprocessor to run at a lower bus rate when doing address correlations. During the process of address correlation, the current micro- processors require a substantial amount of ROM and/or CPU cycles to calculate the weight (number of l's) in a byte. They must either use a serial shift process and add method, or use a large look-up table method. The cycle time of correlating is particularly critical in early address shut down type battery saving. For example, the aver- age current drain increases by 1 A for every 200 micro- seconds of CPU timing used up in the correlation process using a typical paging protocol.

Copyright

Motorola Inc. May 1992

Country

United States

Language

English (United States)

This text was extracted from a PDF file.

At least one non-text object (such as an image or picture) has been suppressed.

This is the abbreviated version, containing approximately
50% of the total text.

Page 1 of 2

MOTOROLA INC. Technical Developments ~olume15 May1992

PERIPHERAL ERROR CALCULATOFj

by Richard A. Erhart, David Hayes and Michael Delfca

In a pager with a microcomputer based decoder, this invention will allow a microprocessor to run at a lower bus rate when doing address correlations. During the process of address correlation, the current micro- processors require a substantial amount of ROM and/or CPU cycles to calculate the weight (number of l's) in a byte. They must either use a serial shift process and add method, or use a large look-up table method. The cycle time of correlating is particularly critical in early address shut down type battery saving. For example, the aver- age current drain increases by 1 A for every 200 micro- seconds of CPU timing used up in the correlation process using a typical paging protocol.

The invention is a relatively simple hardware block which can rapidly calculate the weight (number of l's) in a byte. Prior art designs typically employ a register for holding the word, a tree adder for summing the l's and an output register for latching the results. This inven- tion is shown in Figure 1. The word is written to a regis- ter which automatically right sh& all 1's. This guarantees that there are no Zero's between the total number of l's

in the word. The software can now interrogate this reg- ister and determine exactl; how many errors were in the word. The real benefii comes when the software only needs to determine if be number of errors exceed a predetermined number.IAn example would be the POCSAG pro...